The NJR2839H from Nisshinbo Micro Devices Inc. is a Low Noise Block with RF/Input Frequency 11.20 to 11.70 GHz, Output Frequency 950 MHz to 1.45 GHz, LO Frequency 10.25 GHz, Gain 55 to 60 dB, LO Frequency Stability +/- 10 ppm. More details for NJR2839H can be seen below.